There are, of course, many different approaches to link building, some of which are more respectable than others. At the very bottom of the pile are illegal link building practices, such as hacking into authoritative websites and manipulating these to contain links back to a website that is being promoted. Most professionals would never risk their reputations or freedom by engaging in such practices, but some who are already involved in marketing illicit pharmaceutical or pornography sites see little to lose by breaking the law. These illegal and unethical techniques are widely known as 'black hat'. The black hat label also covers some particularly unethical but not quite illegal processes, such as manipulative cloaking and JavaScript redirects.